Metal-pot for type-casting machines and the like.



APPLICATION FILED SEPT. 20, 1907;

Patented June 11, 1912.

. 2; 47 Z2 7 E./ T a w Maw! U mm I y T m m Mm 1 2 iii v a citizen of the United melting, or metal pot a simple and composgtion,

UNITED sT 'rns PATENT OFFICE.

JOHN S. THOMPSCN, OF CHICAGO, ILLINOIS.

METAL-POT FOR TYPE-CASTING MACHINES AND THE LIKE.

Specification of Letters latent. Patented June 11, 1912 Application filed September 20, 1907. Serial 1704393365.

vTo all wlwm'i't may concern.- v

Be it known that I, JOHN 'S. THOMPSON, States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Metal-Pots for Type- Casting Machines and the Like, of which the following is-a description.

My inventionrelates to that portionof a metal casting mechanism known as the which is employed for storing a quantity of the desired metal or maintaining the same at a suitable temperature, and ejecting a suitable quantity of its contents at each casting operation. Y

The-object the pump Cylinder to the mold by the'shor'tto provide means for varying the amount of mechanism as desired.

9' To this end my inventlon consistsfin the novel construction,- arrangement and com-' bination of parts herein shown and described and more particularly pointed out inthe claims.

In the accompanying drawings wherein like or similar reference characters indicate llke or corresponding parts,'F1gure 1 1s a'.

plan view of my device witha portion of the stand upon which'tho same is mounted, broken away, and'Fig. 2 is a 'section taken substantially'on line 2-2 of Fig. 1.

In thepreferred form shown in the drawings, my device comprises a crucible or receptacle 1 of any desired form or size, provided with an outlet opening 2 on one side near its bottom and a well or cylinder 3 for partially controlling the discharge of metal through said outlet opening. In the preferred construction,thewell 3 is positioned upon the interior of the receptacle near its center in a substantially vertical position, with its lower end extending below the normal bottom of the receptacle and provided with an opening into a pocket or depression 4 formed inthe bottom of the receptacle. In the form shown,

forming a cha'n-' a pocket from of my invention is to provide I reliable device of the kind de-' scribed adapted to discharge themetal from 20 est and most direct passage possible'and also the depres'; sion 4- extends from 'the cylinder to the periphery of the receptacle, nel or recess' for a partIl-of the discharge, rice and'also serving as hich the metal may drawn by the discharge mechanism. The outlet opening 2 also preferably communisame level as the opening 5 at the lower 'end of the cylinder 3, the.adjacent.portions of the outlet 2 and opening 5 being preferably circular in section and finished upon their interiors with the axis of each opening in alinement, so that a choker 6 of substantially the same external diameter as the int-ioned with one end in each and serve as a valve for controlling communication .between the pocket 4' and the openings 2 and 5.

choker 6 is tubular, with its end which is positioned in the opening 2 provided with a nipple 7 adapted to serve as a closure for the small opening or port 8 at the outer; end of the opening 2, a suitable duct or channel 6' being provided at each side of the nipple 7, thus providing a substantially straighttubular connection, open at both ends'between the cylinder 3 and the port -8. The parts are so proportioned that when the extending between the opening 5 and pocket 4 is open. but when the choker 6' is moved to open the .port 8, a portion of the choker 6 closesthe opening or channel 9 thus preventing communication between the cylinder 3 a and recess 4; simultaneously with establishing communication through the choker betweemthe cylinder 3 and port 8. 'In the form shown, the port 8 is formed in ably screwed, or otherwisesecured, in position at the outer end of the opening2, a portion of the nozzle 10 being bored to correspond with the opening 2, thus forming an extension of the opening andirisuring accurate cooperation between associated parts of the choker and the open- Vides convenient means for introducing the choker 6 into its place and also for renewing case the same should become worn or otherwise damaged, f

Any suitable means ma forcing metal from the oy port 8.. As shown, a pl'nnger the cylinder 3 and connected by means of a link 12 to. anarm 14 pivotallyattached to 'an'gpwardly extending memberol t' rigidly maimedupon a bracket 36 and adapted to inder through the the nipple 7 and ing 2 and port 8. This arrangement 'procates with the pocket 4 at substantiallythe terior of the openings 2 and 5 maybe posi- In the preferred construction shown, the

port 8 is closed, an opening or channel 9 I a separate part or-nozzle 10, which is preferor changing the nozzle 10 or choker 8 in be providedfor v 11 -is fitted to be operated by means of a rod 15 attached to the free end of the arm 14'. The opposite end of the rod 15 is provided with a suit able roller 16 or equivalent means arranged .tend to hold the plunger 11 at the lowestlimit of its movement and the roller 16 in contact with the face of the-cam 17,- which is so formed as to normally hold the plunger in an elevated position in the cylinder. A suitable depression 20 is provided in the face of the cam 17 so that at each rotation of the cam when the depression 20 arrives at the roller 16, the same will be temporarily released, permitting the spring 18 to give the plunger 11 a sharp downward movement tending to force any metal in the lower end of' the cylinder 3 through the choker 6 and out at the port 8, suitable means being provided to retract the choker at the same t-ime for this purpose.

Any suitable means may be provlded to control the movement of the choker 6. In

the preferred construction, an arm 21 is pro vided, extending into the pocket 4 with its free end forked or otherwise suitably formed to engage an annular groove or equivalent means 22 upon the choker. The arm 21 is mounted upon a shaft 23, extending transversely of. the metal pot and mounted in suitable bearings 24-24 at the upper ends of the arms 24 attached to the bracket 36 at its extremities. A second arm 25 is also rigidly attached to the shaft 23 with its free end connected by means of a bar 26 to the arm 27 of a bell crank lever 27-28 pivotally mounted upon a transverse shaft 29 in suit able bearings 3030 upon the frame 19. The free end of the arm 28 extends into the path offa suitably formed cam 44 adapted to engage the same and thus move the choker to open the port 8. A spring 31 or other equivalent means is provided extending from an arm 32 rigidly connected to the shaft 23 to a suitable pointnpon the device for normally holding the choker in position to close the port 8.

In the preferred construction, to control the time the port 8 is held open, and thereby the amount of metal discharged at each operation' of the mechanism, to correspond with the size of the type to be cast, an adjustable block 33 is provided upon the arm 28 so arranged that by changing the position 'of the block longitudinally of the arm the movement of the arm and associated parts may be adjusted as desired; that'is, when the block 33 is positioned near the free end of the arm the cam 44 will move the arm and choker farther than when the block is p0- A spring 18 sitioned nearer the pivotal support 29. In

the preferred construction shown, the block 33 is suitably threaded, and a cap screw 34:

is provided for-engaging the threaded portion and controlling its position. A set screw or other suitable means is also preferably provided for engaging a suitably formed groove in the cap screw 34: and prefnting its longitudinal movement, and may i desired be operated to retain the parts in their adjusted position.

The receptacle 1 may be mounted upon the frame 19 in any desired manner. In the form shown, an arm or bracket 36 is pivotally mounted at one end upon the frame as at 3'7 and extends around the rear of the receptacle to the opposite side thereof, where its free end may be secured in any suitable manner to the frame 19. Suitable lugs or projections 3838 are provided upon the receptacle to engage the arm 36 and support the receptaclein position, the whole being adapted to be swung pivotally on the frame at 37.

Any desired means may be provided to control the vertical position of the metal pot. As shown; a suitably. threaded opening is provided in each of the lugs 38 and a set screw 39 is positioned in each opening adapted to extend below the lower face of the lugs and engage, or rest upon, the

bracket 36 for this purpose. In the preferred form also a lug 40 is provided upon the receptacle, directly opposite the nozzle 10 and a set screw 41 is provided in the arm in position to engage the'lug and thus control the transverse position of the metal pot. i

The usual or any preferred form. of burner 4,2 may be provided for controlling the tem-' perature of the receptacle, and connected in any desired manner with a suitable supply of gas, oil, or other fuel. A jacket or housing 43 .having suitable openings for the lugs 38 and 40 and. nozzle 10 is provided to inclose the receptacle and a cover 46 or equivalent means adapted to jointly close the top of both the jacket and the receptacle is provided of the usual or any desired construction. The jacket 43 merely rests upon the lugs 38 and 40 upon the receptacle and also preferably upon the boss surrounding the nozzle 10 as shown in the drawings.

In the drawings, the cams 16 and Mare shown fixed upon a common transverse shaft 15, which may be rotated bymeans of a suitable motor or other convenient source of power (not shown), such operating means not comprising any portion of my present invention.

Having thus described my improvement,-

'iting myself to the exact form and construc- I 9. A metal pot provided with two cy f tion shown.

What I claim as new and desire to secure able plunger, and a horizontally movable choker valve, pivotally mounted levers supported by members 'on said yoke adapted to control the movements of said plunger and choker valve, non-resilient means for adjusting the horizontal position of the metal pot in said yoke, the whole adapted to be swung around in said supporting yoke. 2. A device of the kind described, comprising a pivotally mounted yoke, .a metal pot loosely supported therein, adjusting means arranged on opposite sides of the pot for controlling its vertical position in the yoke, means behind the pot for controlling its horizontal position in said yoke, a plunger and choker valve, and operating levers therefor pivotally mounted in supporting members affixed thereto, thewvhole adapted to be swung around with said yoke to give access to the parts.

3. In a device of the kind described, a base, a yoke pivotally mounted upon said base, a metal pot suspended in said yoke, and means for adjusting said metal pot vertically andhorizontallyin said yoke.

4. In a device of the kind described, a base, a yoke pivotally mounted upon said base, a metal pot suspended in said yoke,

and non-resilient means for adjusting the vertical position of said metal pot.

5. In a device of the kind described, a base, a yoke pivotally mounted upon said base, a metal pot suspended in said yoke,

and non-resilient means for adjusting the metal pot horizontally therein,

6. A metal pot comprising a receptacle for molten metal having a discharge port, a choker valve arranged to normally close said port and means for forcing molten metal from said receptacle through said port, in combination with adjustable ,means for operating sald choker valve arranged to vary the movement of said choker valve and the length of time'said port is open.

7. A metal pot comprising a cylinder, a lunger to force molten meta from said cylinder. a choker valve to control the passage from said cylinder, in combination withmeans for operating said plunger with an unvarying stroke and adjustable means for operating said choker valve and varying the length of time said choker valve remains open.

8. A metal pot, having its discharge portin line with the bottom of said pot, a choker valve adapted to open and close said port, having a channel throughout its length, a plunger and means for operating said choker and plu ge lindrical intersecting borings, a plunger operating in one of said borings and a tubular choker valve operating in the other of'said borings, in combination with means for operating said choker and said plunger to dis- "charge metal from said pot.

1'0. A metal pot provided with a discharge port, a vertical cylinder having a plunger movable therein, a ductconnecting said cylinder and said porthaving a tubular choker valve movable therein, adapted to control the passage from said cylinder to said port.

11. In a device of the kind described, a metal pot having its discharge port in the bottom of one side, a choker valve having an opening throughout its length, horizontally movable and adapted to open and close said port, a pump adapted to discharge metal through said port in a straight line from the bottomof said pot, and means for operating said choker valve and plunger.

12-. In a device of the kind described, a receptacle having a discharge port in one side, a tubular choker valve adapted to control said port, means for operating said choker and means for periodically forcing metal through said choker and said. port.

13. In a device of the kind described, a receptacle having a discharge port in one side at its bottom, a tubular choker valve adapted to control said port, means for operating said choker and means for periodically forcing metal through said choker and said port.

14. In a device of the kind described,a receptacle having a discharge port in one side, a well or cylinder positioned within said receptacle, a tubular choker valve connecting said port to the lower-end of said cylinder and adapted to close said port.

means for operating said choker, and means for periodically forcing metal through said choker.

15. In a device of the kind described. a metal pot having a discharge port in one side, a substantially vertical well or cylinder positioned within said metal pot, a tubular choker adapted to simultaneously open the ort and close the opening between one end of the cylinder and the metal pot. means for operating said choker and means for periodically forcing metal through said choker and out of said port.

16. Ina device of the kind described, a receptacle having a discharge port in one Iside,-a well orrcylinder positioned within said receptacle, a tubular choker valve arranged to form a passage between said port 17. In a device of the kind described, a

. receptacle having a discharge port in one said. choker to said port.

side, a tubular choker adapted to control said port, means for operating and adjusting the movements of said choker, and means for periodically forcing the metal through 18. A metal pot provided with two -cy-- lindrical intersectin borings, a plunger opcrating in one of-said borings and a chokervalve operating in the other, in'combinationwith means. for changing the length of the stroke of said choker valve to control the amount of, metal delivered from said pot at each operation of said plunger.

19. A metal pot comprising a receptacle for-molten metal having a discharge port;

.a choker valve arranged to normally close said port, a'pump for forcing molten metal from said receptacle through said port, and

-means for operating said pump, in combination with adjustable means for operating said choker valve arranged to vary the length of time said port is open. r

'20. A metal pot comprising a receptacle. for molten metal having a discharge port, a choker valve arranged to 'normally'rlose said port, a pump positioned in said receptacle for forcing molten metal from the receptacle through said ort, and means for operating said pump, in combination with adjustable means for operating said choker valve arranged to vary the stroke of said choker valve and the length of. time said port is open.

21. A metal pot comprisingla receptacle for molten metal having a discharge port, a choker valve arranged to normally close said port and means for forcing molten metal .from said receptacle through said port, in combination with a cam and means connected to said choker valve having an adjustable part arranged to coiiperate with said cam to operate said choker valve and vary the stroke of said choker valve and the length'oftimesaid port is open.

22'. A metal pot comprising a receptacle for molten metal having a discharge port, a choker valve arranged to normally close said'port, a pump for forcing molten metal from said-"receptacle through said port, andmeans for operating said pump, in combination with a cam; and meansconnected to said choker. valve having an adjustable part arranged to cooperate with said cam to operate saidchoker valve and vary the stroke of said choker valve and the length of -time said port is open.

23. A metal pot comprising a receptacle for molten metal having a discharge port, a choker valve arranged to normally close said port, a pump positioned in said receptacle for forcing molten metal from the re.-

ceptacle through said port, and means for operating said pump, in combination with a .camand means connected to said choker igvalve having an adjustable part arragged to cooperate with said cam to operate said choker valve and vary the stroke of said choker valve and the length of time said port is open.

24. A metal pot comprising a receptacle formolten metal having a discharge port, a choker valve arranged to-normally close said port, a pump for forcing moltenmet-al- 'from' said receptacle through said port, and

means for operating said pump with an an? varying stroke, in combination with adjust- -able means for operating said choker valve 1 arranged to vary the stroke of said choker:

valve'and the lengthof time said port is' open.

25. A metal pot comprising a receptacle for molten metal having a dischargeport,

a choker valve arranged to normally close said port, a pump for forcing molten metal from said receptacle through said port,,.and

means for operating said pump with an unvarying stroke, in combination with a cam and means connected to said choker valve having an adjustable partarranged to coiiperate with said cam to operate said choker valve and the length of time said port is open.

26. In a device of the kind-described, a

tubular choker valve adapted to control the outletropening of a metal'potand to'direot the metakto said outlet opening, one end of said valve being adapted to extend into and close said outlet opening.

choker valve and vary thestroke of said ion 27. In a device of the kind described, a

are 

